{"product_id":"allen-bradley-1738-ie4cm12-a-armorpoint-i-o-module","title":"Allen-Bradley 1738-IE4CM12\/A ArmorPoint I\/O Module","description":"\u003ch1\u003eAllen-Bradley 1738-IE4CM12\/A ArmorPoint I\/O Module\u003c\/h1\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1738-IE4CM12\/A\u003c\/strong\u003e, also cataloged as the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1738-IE4CM12\/A Analog Input Module\u003c\/strong\u003e, serves as a dedicated hardware component for acquisition of 0-20 mA and 4-20 mA loop current signals within ArmorPoint distributed I\/O networks. Configured for analog current sampling in segmented field I\/O architectures, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1738-IE4CM12\/A\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eprovides direct physical-to-digital conversion of four single-ended input channels through a 24 VDC backplane supply structure.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cp\u003eThe 1738-IE4CM12\/A model designation is structured as a single catalog identifier within the ArmorPoint (Bulletin 1738) family. No additional functional sub-code segmentation is defined for analog input channel configuration or environmental rating; all operational parameters are fixed at module level.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003cth class=\"last:pe-10\"\u003eParameter\u003c\/th\u003e\n\u003cth class=\"last:pe-10\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e1738-IE4CM12\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-20 deg C to +60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Inputs\u003c\/td\u003e\n\u003ctd\u003e4 single-ended current inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Range\u003c\/td\u003e\n\u003ctd\u003e0-20 mA \/ 4-20 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e16-bit signed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnector Type\u003c\/td\u003e\n\u003ctd\u003eM12 quick-disconnect\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection Rating\u003c\/td\u003e\n\u003ctd\u003eIP65 \/ IP66 \/ IP67 \/ IP69K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eBackplane I\/O Density and Deterministic Update Behavior\u003c\/h3\u003e\n\u003cp\u003eWithin Allen-Bradley ArmorPoint distributed control architecture, the 1738-IE4CM12\/A interfaces with the backplane communication layer supporting change-of-state (COS) update execution. I\/O refresh cycles are synchronized across Profinet or EtherNet\/IP transport layers, enabling deterministic data sampling across modular field nodes. Channel density scaling is constrained by backplane current budget allocation and module grouping topology.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003eQ: Does the 1738-IE4CM12\/A support hot-swap under energized conditions?\u003cbr\u003eA: Yes. The module supports RIUP (Removal and Insertion Under Power), but input channels must be in a non-critical state to avoid transient signal misinterpretation during reconnection.\u003c\/p\u003e\n\u003cp\u003eQ: What is the resolution behavior for low-current signal ranges?\u003cbr\u003eA: The module provides 16-bit signed resolution across 0-20 mA and 4-20 mA ranges, with quantization applied at the A\/D conversion stage per channel.\u003c\/p\u003e\n\u003cp\u003eQ: Can the module operate without an external enclosure due to IP rating?\u003cbr\u003eA: The housing is rated up to IP69K; enclosure-free operation is permitted if M12 sealing integrity and cable gland torque specifications are maintained.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eM12 connectors must be fully torqued to ensure sealing continuity across IP-rated interfaces. Signal cables shall be routed with separation from high-voltage conductors to reduce inductive coupling into 4-20 mA loops. Shield termination must be grounded at one defined system point to avoid ground loop current injection. During installation, maintain mechanical strain relief at cable entry points to prevent connector micro-movement under vibration loading. Module replacement under RIUP conditions must ensure stable loop current before insertion or removal.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43497675784282,"sku":"1738-IE4CM12\/A","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1738-IE4CM12A2.jpg?v=1781506135","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1738-ie4cm12-a-armorpoint-i-o-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}